<aside id="sidebar" class="a4u-sidebars" role="complementary">
  <div id="sidebar-1" class="a4u-sidebar a4u-sidebar-1">
    <?php if ( function_exists('dynamic_sidebar') && dynamic_sidebar('sidebar1') ) : else : ?>
    <!-- TODO(junyu): Make sure it works w/o dynamic sidebar. -->
    <?php endif; ?>
  </div>
  <div id="sidebar-2" class="a4u-sidebar a4u-sidebar-2">
    <?php if ( function_exists('dynamic_sidebar') && dynamic_sidebar('sidebar2') ) : else : ?>
    <?php endif; ?>
  </div>
</aside>
